Geotechnical Engineering
Leveraging decades of combined experience, GRG's family of companies excels in geotechnical engineering, offering advanced solutions for soil and rock mechanics, geotechnical design, and value engineering. Our expertise ensures analysis and innovative approaches to meet the complexities of geotechnical challenges, supporting a wide range of projects.
Geotechnical Investigation
Geotechnical Instrumentation Design & Implementation
Deep Foundation Design
Earth Retention Design
Pavement Design Engineering
Slope Stability & Restoration
Soil Forensic Engineering
Soil Infiltration
Geotechnical Laboratory Testing
Project Portfolio
I-94 & I-69 Interchange Reconstruction
Location: Port Huron Township, Michigan
Client: Toebe Construction, LLC
Services: Geotechnical Engineering, Value Engineering, Remote Instrumentation Monitoring, Settlement and Vibration, and Temporary Earth Retention Design
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Currently under construction, the new 1.3-million-square-foot building broke ground in 2017 on the former Hudson’s Department Store site. Standing at 680 feet tall, identifying the appropriate building foundation was crucial. Rohrscheib Sons Caissons contracted G2 in October 2018 to perform special inspections for the drilled pier foundations.
Hudson’s Detroit
Location: Detroit, Michigan
Client: Rohrscheib Sons Caissons
Services: Foundation Design and Geotechnical Instrumentation Monitoring
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The Michigan Department of Transportation reconstructed the I-94/I-69 interchange, replacing bridges and reconstructing ramps. Through evaluation of subsurface conditions, value engineering, and instrumentation monitoring, G2 aided the contractor with this $76 million project, maximizing efficiency and minimizing costs while protecting nearby residences.
Great Lakes Central Railroad Over Manistee
Location: Ypsilanti Township, Michigan
Client: Colliers Engineering & Design
Services: Geotechnical investigation
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MTC provided geotechnical services throughout various phases of a large development, supporting the construction of a gaming facility, casino expansions, parking structures, and a hotel tower. Their work included site improvements like storage tanks, wastewater treatment, and expansions to parking lots and casino spaces.
Gun Lake Casino (Phase 1-5)
Location: Wayland, Michigan
Client: Gun Lake Casino Gaming Authority
Services: Soil borings, wick drain settlement design, aggregate pier ground improvement, drilled shaft design, and Osterberg Load Cell testing
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The original timber-framed bridge, built in 1888, required replacement due to age-related speed and weight restrictions. GLC and MDOT partnered with Kiewit Corporation under a CM/GC contract to design the new bridge. The geotechnical study involved deep soil test borings from the elevated track and behind abutments to assess substructure and slope performance. Several bridge options were considered, with the preferred design being a three-span structure supported by driven piles and drilled shafts to ensure stability and meet design standards.